Dimensions of Class 150 to Class 600 Flat Ring Gaskets to ASME B16.21 for use with ASME B16.47 Series A RF Flanges.
| Nominal Pipe Size | Inside Diameter (mm) |
Outside Diameter (mm) |
||||
|---|---|---|---|---|---|---|
| DN | INCH | Class 150 | Class 300 | Class 400 | Class 600 | |
| 650 | 26 | 660 | 775 | 835 | 832 | 867 |
| 700 | 28 | 711 | 832 | 899 | 892 | 914 |
| 750 | 30 | 762 | 883 | 953 | 946 | 972 |
| 800 | 32 | 813 | 940 | 1006 | 1003 | 1022 |
| 850 | 34 | 864 | 991 | 1057 | 1054 | 1073 |
| 900 | 36 | 914 | 1048 | 1118 | 1118 | 1130 |
| 950 | 38 | 965 | 1111 | 1054 | 1073 | 1105 |
| 1000 | 40 | 1016 | 1162 | 1114 | 1127 | 1156 |
| 1050 | 42 | 1067 | 1219 | 1165 | 1178 | 1219 |
| 1100 | 44 | 1118 | 1276 | 1219 | 1232 | 1270 |
| 1150 | 46 | 1168 | 1327 | 1273 | 1289 | 1327 |
| 1200 | 48 | 1219 | 1384 | 1324 | 1346 | 1391 |
| 1250 | 50 | 1270 | 1435 | 1378 | 1403 | 1448 |
| 1300 | 52 | 1321 | 1492 | 1429 | 1454 | 1499 |
| 1350 | 54 | 1372 | 1549 | 1492 | 1518 | 1556 |
| 1400 | 56 | 1422 | 1607 | 1543 | 1568 | 1613 |
| 1450 | 58 | 1473 | 1664 | 1594 | 1619 | 1664 |
| 1500 | 60 | 1524 | 1715 | 1645 | 1683 | 1721 |
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